Sata controller passthrough. VM no bootable device

jmccoy555

@impovich Ah yeah. Only passed though a controller to Linux VMs and that works fine. Could try TrueNAS Scale??

https://forums.freebsd.org/threads/dev-ad4-becomes-dev-ada0.29899/ Any help?

I'm out of ideas I'm afraid.

impovich

@jmccoy555 said in Sata controller passthrough. VM no bootable device:

@impovich Ah yeah. Only passed though a controller to Linux VMs and that works fine. Could try TrueNAS Scale??

https://forums.freebsd.org/threads/dev-ad4-becomes-dev-ada0.29899/ Any help?

I'm out of ideas I'm afraid.

I tried to do the same with Debian, no success. Reading freebsd forum regarding labeling

jmccoy555

@impovich Passing though my second onbord SATA controller to a Debian 10 VM gives me xvda for the virtual disk and sda, sdb, etc for discs on the passed though controller.

impovich

@jmccoy555 so managed to do it with a dirty hack

Spwaned a new VM with 3 virtual drives
ada0 - 5gb
ada1 - 5gb
ada2 - 50gb
installed Truenas on ada2.
After installation removed ada0 and ada1
Rebooted VM and confirmed that ada2 is still ada2
passed through SATA controller
Bingo!!


root@truenas[~]# geom disk list
Geom name: ada2
Providers:
1. Name: ada2
   Mediasize: 53687091200 (50G)
   Sectorsize: 512
   Mode: r1w1e2
   descr: (null)


Geom name: cd0
Providers:
1. Name: cd0
   Mediasize: 0 (0B)
   Sectorsize: 2048
   Mode: r0w0e0
   descr: QEMU QEMU DVD-ROM
   ident: (null)

Geom name: ada0
Providers:
1. Name: ada0
   Mediasize: 4000787030016 (3.6T)
   Sectorsize: 512
   Stripesize: 4096
   Stripeoffset: 0
   Mode: r0w0e0
   descr: ST4000LM024-2U817V
   lunid: 5000c500d5

   fwheads: 16

Geom name: ada1
Providers:
1. Name: ada1
   Mediasize: 4000787030016 (3.6T)
   Sectorsize: 512
   Stripesize: 4096
   Stripeoffset: 0
   Mode: r0w0e0

impovich

Finally, I found a solution to the issue:
https://www.truenas.com/community/threads/multiple-ada0-partitions-on-xen-pv-w-passthrough.16574/

set via GUI tunables interface:

hint.ada.0.at="scbus100".

Works perfectly!

root@truenas[~]# geom disk list
Geom name: ada0
Providers:
1. Name: ada0
   Mediasize: 53687091200 (50G)
   Sectorsize: 512
   Mode: r1w1e2
   descr: (null)
   ident: (null)
   rotationrate: unknown
   fwsectors: 0
   fwheads: 0

Geom name: cd0
Providers:
1. Name: cd0
   Mediasize: 0 (0B)
   Sectorsize: 2048
   Mode: r0w0e0
   descr: QEMU QEMU DVD-ROM
   ident: (null)
   rotationrate: unknown
   fwsectors: 0
   fwheads: 0

Geom name: ada1
Providers:
1. Name: ada1
   Mediasize: 4000787030016 (3.6T)
   Sectorsize: 512
   Stripesize: 4096
   Stripeoffset: 0
   Mode: r0w0e0
   descr: ST4000LM024-2U817V
   lunid: 5000c500d5b4af0c
   ident: WCK7ABLM
   rotationrate: 5400
   fwsectors: 63
   fwheads: 16

Geom name: ada2
Providers:
1. Name: ada2
   Mediasize: 4000787030016 (3.6T)
   Sectorsize: 512
   Stripesize: 4096
   Stripeoffset: 0
   Mode: r0w0e0
   descr: ST4000LM024-2U817V
   lunid: 5000c500d5b3d1cb
   ident: WCK7ADS1
   rotationrate: 5400
   fwsectors: 63
   fwheads: 16

jmccoy555

@impovich How odd that that can even happen. I still prefer the hack

jmccoy555

@impovich I'm running with a 10gb boot drive if you want to save a bit of space, speed up backups etc.

impovich

@jmccoy555 sorry but didn't get it. I'm a newbie

jmccoy555

@impovich just saying 50gb is quite big for TrueNAS, but not a problem.

impovich

@jmccoy555 got it. Thank you for being with me during this amazing journey